Copying

Copy Go Slices with slices.Clone

A slice assignment copies the slice header, not its backing array. That detail becomes visible as soon as one variable changes an element and another variable unexpectedly sees the same change. slices.Clone gives the copied slice separate element storage with a single call. The copy is shallow. That makes it a clean fit for slices of numbers, strings, and value-only structs, but nested maps, slices, pointers, and other reference-like values still need deliberate handling.